raster to polygon conversion

I ‘m trying to automate the conversion of raster to polygon and the rasters files are in “TIF” format which is a “unsigned integer”. I have the code below. However, I ‘m getting an error while executing it. Could you have some suggestion please?

Code:

import arcpy, os
from arcpy import env
from arcpy.sa import *

#To overwrite output
arcpy.env.overwriteOutput = True

#Set environment settings
env.workspace = "C:/Subhasis/Test/Neshanic_Python/extract"

outws="C:/Subhasis/Test/Neshanic_Python/extract/clip/"

#checkout ArcGIS spatial analyst extension license
arcpy.CheckOutExtension("Spatial")

inraster = arcpy.ListRasters("*", "TIF")

for i in inraster:
    filename=os.path.splitext(i)[0]
    outPolygons= outws + str(filename) + '.shape'
    field = "VALUE"
    arcpy.RasterToPolygon_conversion(inraster, outPolygons, "NO_SIMPLIFY", field)

Error: Traceback (most recent call last): File
“C:SubhasisTestNeshanic_PythonextractClip.py”, line 23, in

arcpy.RasterToPolygon_conversion(inraster, outPolygons, “NO_SIMPLIFY”, field) File “C:Program Files
(x86)ArcGISDesktop10.2arcpyarcpyconversion.py”, line 241, in
RasterToPolygon raise e